1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * boot.c - Architecture-Specific Low-Level ACPI Boot Support 4 * 5 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> 6 * Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com> 7 */ 8 #define pr_fmt(fmt) "ACPI: " fmt 9 10 #include <linux/init.h> 11 #include <linux/acpi.h> 12 #include <linux/acpi_pmtmr.h> 13 #include <linux/efi.h> 14 #include <linux/cpumask.h> 15 #include <linux/export.h> 16 #include <linux/dmi.h> 17 #include <linux/irq.h> 18 #include <linux/slab.h> 19 #include <linux/memblock.h> 20 #include <linux/ioport.h> 21 #include <linux/pci.h> 22 #include <linux/efi-bgrt.h> 23 #include <linux/serial_core.h> 24 #include <linux/pgtable.h> 25 26 #include <xen/xen.h> 27 28 #include <asm/e820/api.h> 29 #include <asm/irqdomain.h> 30 #include <asm/pci_x86.h> 31 #include <asm/io_apic.h> 32 #include <asm/apic.h> 33 #include <asm/io.h> 34 #include <asm/mpspec.h> 35 #include <asm/smp.h> 36 #include <asm/i8259.h> 37 #include <asm/setup.h> 38 39 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */ 40 static int __initdata acpi_force = 0; 41 int acpi_disabled; 42 EXPORT_SYMBOL(acpi_disabled); 43 44 #ifdef CONFIG_X86_64 45 # include <asm/proto.h> 46 #endif /* X86 */ 47 48 int acpi_noirq; /* skip ACPI IRQ initialization */ 49 static int acpi_nobgrt; /* skip ACPI BGRT */ 50 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */ 51 EXPORT_SYMBOL(acpi_pci_disabled); 52 53 int acpi_lapic; 54 int acpi_ioapic; 55 int acpi_strict; 56 int acpi_disable_cmcff; 57 bool acpi_int_src_ovr[NR_IRQS_LEGACY]; 58 59 /* ACPI SCI override configuration */ 60 u8 acpi_sci_flags __initdata; 61 u32 acpi_sci_override_gsi __initdata = INVALID_ACPI_IRQ; 62 int acpi_skip_timer_override __initdata; 63 int acpi_use_timer_override __initdata; 64 int acpi_fix_pin2_polarity __initdata; 65 66 #ifdef CONFIG_X86_LOCAL_APIC 67 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE; 68 static bool has_lapic_cpus __initdata; 69 static bool acpi_support_online_capable; 70 #endif 71 72 #ifdef CONFIG_X86_IO_APIC 73 /* 74 * Locks related to IOAPIC hotplug 75 * Hotplug side: 76 * ->device_hotplug_lock 77 * ->acpi_ioapic_lock 78 * ->ioapic_lock 79 * Interrupt mapping side: 80 * ->acpi_ioapic_lock 81 * ->ioapic_mutex 82 * ->ioapic_lock 83 */ 84 static DEFINE_MUTEX(acpi_ioapic_lock); 85 #endif 86 87 /* -------------------------------------------------------------------------- 88 Boot-time Configuration 89 -------------------------------------------------------------------------- */ 90 91 /* 92 * The default interrupt routing model is PIC (8259). This gets 93 * overridden if IOAPICs are enumerated (below). 94 */ 95 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC; 96 97 98 /* 99 * ISA irqs by default are the first 16 gsis but can be 100 * any gsi as specified by an interrupt source override. 101 */ 102 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = { 103 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 104 }; 105 106 /* 107 * This is just a simple wrapper around early_memremap(), 108 * with sanity checks for phys == 0 and size == 0. 109 */ 110 void __init __iomem *__acpi_map_table(unsigned long phys, unsigned long size) 111 { 112 113 if (!phys || !size) 114 return NULL; 115 116 return early_memremap(phys, size); 117 } 118 119 void __init __acpi_unmap_table(void __iomem *map, unsigned long size) 120 { 121 if (!map || !size) 122 return; 123 124 early_memunmap(map, size); 125 } 126 127 #ifdef CONFIG_X86_LOCAL_APIC 128 static int __init acpi_parse_madt(struct acpi_table_header *table) 129 { 130 struct acpi_table_madt *madt = NULL; 131 132 if (!boot_cpu_has(X86_FEATURE_APIC)) 133 return -EINVAL; 134 135 madt = (struct acpi_table_madt *)table; 136 if (!madt) { 137 pr_warn("Unable to map MADT\n"); 138 return -ENODEV; 139 } 140 141 if (madt->address) { 142 acpi_lapic_addr = (u64) madt->address; 143 144 pr_debug("Local APIC address 0x%08x\n", madt->address); 145 } 146 147 if (madt->flags & ACPI_MADT_PCAT_COMPAT) 148 legacy_pic_pcat_compat(); 149 150 /* ACPI 6.3 and newer support the online capable bit. */ 151 if (acpi_gbl_FADT.header.revision > 6 || 152 (acpi_gbl_FADT.header.revision == 6 && 153 acpi_gbl_FADT.minor_revision >= 3)) 154 acpi_support_online_capable = true; 155 156 default_acpi_madt_oem_check(madt->header.oem_id, 157 madt->header.oem_table_id); 158 159 return 0; 160 } 161 162 static bool __init acpi_is_processor_usable(u32 lapic_flags) 163 { 164 if (lapic_flags & ACPI_MADT_ENABLED) 165 return true; 166 167 if (!acpi_support_online_capable || 168 (lapic_flags & ACPI_MADT_ONLINE_CAPABLE)) 169 return true; 170 171 return false; 172 } 173 174 static int __init 175 acpi_parse_x2apic(union acpi_subtable_headers *header, const unsigned long end) 176 { 177 struct acpi_madt_local_x2apic *processor = NULL; 178 #ifdef CONFIG_X86_X2APIC 179 u32 apic_id; 180 u8 enabled; 181 #endif 182 183 processor = (struct acpi_madt_local_x2apic *)header; 184 185 if (BAD_MADT_ENTRY(processor, end)) 186 return -EINVAL; 187 188 acpi_table_print_madt_entry(&header->common); 189 190 #ifdef CONFIG_X86_X2APIC 191 apic_id = processor->local_apic_id; 192 enabled = processor->lapic_flags & ACPI_MADT_ENABLED; 193 194 /* Ignore invalid ID */ 195 if (apic_id == 0xffffffff) 196 return 0; 197 198 /* don't register processors that cannot be onlined */ 199 if (!acpi_is_processor_usable(processor->lapic_flags)) 200 return 0; 201 202 /* 203 * According to https://uefi.org/specs/ACPI/6.5/05_ACPI_Software_Programming_Model.html#processor-local-x2apic-structure 204 * when MADT provides both valid LAPIC and x2APIC entries, the APIC ID 205 * in x2APIC must be equal or greater than 0xff. 206 */ 207 if (has_lapic_cpus && apic_id < 0xff) 208 return 0; 209 210 /* 211 * We need to register disabled CPU as well to permit 212 * counting disabled CPUs. This allows us to size 213 * cpus_possible_map more accurately, to permit 214 * to not preallocating memory for all NR_CPUS 215 * when we use CPU hotplug. 216 */ 217 if (!apic_id_valid(apic_id)) { 218 if (enabled) 219 pr_warn("x2apic entry ignored\n"); 220 return 0; 221 } 222 223 topology_register_apic(apic_id, processor->uid, enabled); 224 #else 225 pr_warn("x2apic entry ignored\n"); 226 #endif 227 228 return 0; 229 } 230 231 static int __init 232 acpi_check_lapic(union acpi_subtable_headers *header, const unsigned long end) 233 { 234 struct acpi_madt_local_apic *processor = NULL; 235 236 processor = (struct acpi_madt_local_apic *)header; 237 238 if (BAD_MADT_ENTRY(processor, end)) 239 return -EINVAL; 240 241 /* Ignore invalid ID */ 242 if (processor->id == 0xff) 243 return 0; 244 245 /* Ignore processors that can not be onlined */ 246 if (!acpi_is_processor_usable(processor->lapic_flags)) 247 return 0; 248 249 has_lapic_cpus = true; 250 return 0; 251 } 252 253 static int __init 254 acpi_parse_lapic(union acpi_subtable_headers * header, const unsigned long end) 255 { 256 struct acpi_madt_local_apic *processor = NULL; 257 258 processor = (struct acpi_madt_local_apic *)header; 259 260 if (BAD_MADT_ENTRY(processor, end)) 261 return -EINVAL; 262 263 acpi_table_print_madt_entry(&header->common); 264 265 /* Ignore invalid ID */ 266 if (processor->id == 0xff) 267 return 0; 268 269 /* don't register processors that can not be onlined */ 270 if (!acpi_is_processor_usable(processor->lapic_flags)) 271 return 0; 272 273 /* 274 * We need to register disabled CPU as well to permit 275 * counting disabled CPUs. This allows us to size 276 * cpus_possible_map more accurately, to permit 277 * to not preallocating memory for all NR_CPUS 278 * when we use CPU hotplug. 279 */ 280 topology_register_apic(processor->id, /* APIC ID */ 281 processor->processor_id, /* ACPI ID */ 282 processor->lapic_flags & ACPI_MADT_ENABLED); 283 284 return 0; 285 } 286 287 static int __init 288 acpi_parse_sapic(union acpi_subtable_headers *header, const unsigned long end) 289 { 290 struct acpi_madt_local_sapic *processor = NULL; 291 292 processor = (struct acpi_madt_local_sapic *)header; 293 294 if (BAD_MADT_ENTRY(processor, end)) 295 return -EINVAL; 296 297 acpi_table_print_madt_entry(&header->common); 298 299 topology_register_apic((processor->id << 8) | processor->eid,/* APIC ID */ 300 processor->processor_id, /* ACPI ID */ 301 processor->lapic_flags & ACPI_MADT_ENABLED); 302 303 return 0; 304 } 305 306 static int __init 307 acpi_parse_lapic_addr_ovr(union acpi_subtable_headers * header, 308 const unsigned long end) 309 { 310 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL; 311 312 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header; 313 314 if (BAD_MADT_ENTRY(lapic_addr_ovr, end)) 315 return -EINVAL; 316 317 acpi_table_print_madt_entry(&header->common); 318 319 acpi_lapic_addr = lapic_addr_ovr->address; 320 321 return 0; 322 } 323 324 static int __init 325 acpi_parse_x2apic_nmi(union acpi_subtable_headers *header, 326 const unsigned long end) 327 { 328 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL; 329 330 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header; 331 332 if (BAD_MADT_ENTRY(x2apic_nmi, end)) 333 return -EINVAL; 334 335 acpi_table_print_madt_entry(&header->common); 336 337 if (x2apic_nmi->lint != 1) 338 pr_warn("NMI not connected to LINT 1!\n"); 339 340 return 0; 341 } 342 343 static int __init 344 acpi_parse_lapic_nmi(union acpi_subtable_headers * header, const unsigned long end) 345 { 346 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL; 347 348 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header; 349 350 if (BAD_MADT_ENTRY(lapic_nmi, end)) 351 return -EINVAL; 352 353 acpi_table_print_madt_entry(&header->common); 354 355 if (lapic_nmi->lint != 1) 356 pr_warn("NMI not connected to LINT 1!\n"); 357 358 return 0; 359 } 360 #endif /* CONFIG_X86_LOCAL_APIC */ 361 362 #ifdef CONFIG_X86_IO_APIC 363 #define MP_ISA_BUS 0 364 365 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity, 366 u8 trigger, u32 gsi); 367 368 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, 369 u32 gsi) 370 { 371 /* 372 * Check bus_irq boundary. 373 */ 374 if (bus_irq >= NR_IRQS_LEGACY) { 375 pr_warn("Invalid bus_irq %u for legacy override\n", bus_irq); 376 return; 377 } 378 379 /* 380 * TBD: This check is for faulty timer entries, where the override 381 * erroneously sets the trigger to level, resulting in a HUGE 382 * increase of timer interrupts! 383 */ 384 if ((bus_irq == 0) && (trigger == 3)) 385 trigger = 1; 386 387 if (mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi) < 0) 388 return; 389 /* 390 * Reset default identity mapping if gsi is also an legacy IRQ, 391 * otherwise there will be more than one entry with the same GSI 392 * and acpi_isa_irq_to_gsi() may give wrong result. 393 */ 394 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi) 395 isa_irq_to_gsi[gsi] = INVALID_ACPI_IRQ; 396 isa_irq_to_gsi[bus_irq] = gsi; 397 } 398 399 static void mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger, 400 int polarity) 401 { 402 #ifdef CONFIG_X86_MPPARSE 403 struct mpc_intsrc mp_irq; 404 struct pci_dev *pdev; 405 unsigned char number; 406 unsigned int devfn; 407 int ioapic; 408 u8 pin; 409 410 if (!acpi_ioapic) 411 return; 412 if (!dev || !dev_is_pci(dev)) 413 return; 414 415 pdev = to_pci_dev(dev); 416 number = pdev->bus->number; 417 devfn = pdev->devfn; 418 pin = pdev->pin; 419 /* print the entry should happen on mptable identically */ 420 mp_irq.type = MP_INTSRC; 421 mp_irq.irqtype = mp_INT; 422 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) | 423 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3); 424 mp_irq.srcbus = number; 425 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3); 426 ioapic = mp_find_ioapic(gsi); 427 mp_irq.dstapic = mpc_ioapic_id(ioapic); 428 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi); 429 430 mp_save_irq(&mp_irq); 431 #endif 432 } 433 434 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity, 435 u8 trigger, u32 gsi) 436 { 437 struct mpc_intsrc mp_irq; 438 int ioapic, pin; 439 440 /* Convert 'gsi' to 'ioapic.pin'(INTIN#) */ 441 ioapic = mp_find_ioapic(gsi); 442 if (ioapic < 0) { 443 pr_warn("Failed to find ioapic for gsi : %u\n", gsi); 444 return ioapic; 445 } 446 447 pin = mp_find_ioapic_pin(ioapic, gsi); 448 449 mp_irq.type = MP_INTSRC; 450 mp_irq.irqtype = mp_INT; 451 mp_irq.irqflag = (trigger << 2) | polarity; 452 mp_irq.srcbus = MP_ISA_BUS; 453 mp_irq.srcbusirq = bus_irq; 454 mp_irq.dstapic = mpc_ioapic_id(ioapic); 455 mp_irq.dstirq = pin; 456 457 mp_save_irq(&mp_irq); 458 459 return 0; 460 } 461 462 static int __init 463 acpi_parse_ioapic(union acpi_subtable_headers * header, const unsigned long end) 464 { 465 struct acpi_madt_io_apic *ioapic = NULL; 466 struct ioapic_domain_cfg cfg = { 467 .type = IOAPIC_DOMAIN_DYNAMIC, 468 .ops = &mp_ioapic_irqdomain_ops, 469 }; 470 471 ioapic = (struct acpi_madt_io_apic *)header; 472 473 if (BAD_MADT_ENTRY(ioapic, end)) 474 return -EINVAL; 475 476 acpi_table_print_madt_entry(&header->common); 477 478 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */ 479 if (ioapic->global_irq_base < nr_legacy_irqs()) 480 cfg.type = IOAPIC_DOMAIN_LEGACY; 481 482 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base, 483 &cfg); 484 485 return 0; 486 } 487 488 /* 489 * Parse Interrupt Source Override for the ACPI SCI 490 */ 491 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi) 492 { 493 if (trigger == 0) /* compatible SCI trigger is level */ 494 trigger = 3; 495 496 if (polarity == 0) /* compatible SCI polarity is low */ 497 polarity = 3; 498 499 /* Command-line over-ride via acpi_sci= */ 500 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) 501 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2; 502 503 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK) 504 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK; 505 506 if (bus_irq < NR_IRQS_LEGACY) 507 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi); 508 else 509 mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi); 510 511 acpi_penalize_sci_irq(bus_irq, trigger, polarity); 512 513 /* 514 * stash over-ride to indicate we've been here 515 * and for later update of acpi_gbl_FADT 516 */ 517 acpi_sci_override_gsi = gsi; 518 return; 519 } 520 521 static int __init 522 acpi_parse_int_src_ovr(union acpi_subtable_headers * header, 523 const unsigned long end) 524 { 525 struct acpi_madt_interrupt_override *intsrc = NULL; 526 527 intsrc = (struct acpi_madt_interrupt_override *)header; 528 529 if (BAD_MADT_ENTRY(intsrc, end)) 530 return -EINVAL; 531 532 acpi_table_print_madt_entry(&header->common); 533 534 if (intsrc->source_irq < NR_IRQS_LEGACY) 535 acpi_int_src_ovr[intsrc->source_irq] = true; 536 537 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) { 538 acpi_sci_ioapic_setup(intsrc->source_irq, 539 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 540 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 541 intsrc->global_irq); 542 return 0; 543 } 544 545 if (intsrc->source_irq == 0) { 546 if (acpi_skip_timer_override) { 547 pr_warn("BIOS IRQ0 override ignored.\n"); 548 return 0; 549 } 550 551 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity 552 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) { 553 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK; 554 pr_warn("BIOS IRQ0 pin2 override: forcing polarity to high active.\n"); 555 } 556 } 557 558 mp_override_legacy_irq(intsrc->source_irq, 559 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 560 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 561 intsrc->global_irq); 562 563 return 0; 564 } 565 566 static int __init 567 acpi_parse_nmi_src(union acpi_subtable_headers * header, const unsigned long end) 568 { 569 struct acpi_madt_nmi_source *nmi_src = NULL; 570 571 nmi_src = (struct acpi_madt_nmi_source *)header; 572 573 if (BAD_MADT_ENTRY(nmi_src, end)) 574 return -EINVAL; 575 576 acpi_table_print_madt_entry(&header->common); 577 578 /* TBD: Support nimsrc entries? */ 579 580 return 0; 581 } 582 583 #endif /* CONFIG_X86_IO_APIC */ 584 585 /* 586 * acpi_pic_sci_set_trigger() 587 * 588 * use ELCR to set PIC-mode trigger type for SCI 589 * 590 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's 591 * it may require Edge Trigger -- use "acpi_sci=edge" 592 * 593 * Port 0x4d0-4d1 are ELCR1 and ELCR2, the Edge/Level Control Registers 594 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge. 595 * ELCR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0) 596 * ELCR2 is IRQs 8-15 (IRQ 8, 13 must be 0) 597 */ 598 599 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) 600 { 601 unsigned int mask = 1 << irq; 602 unsigned int old, new; 603 604 /* Real old ELCR mask */ 605 old = inb(PIC_ELCR1) | (inb(PIC_ELCR2) << 8); 606 607 /* 608 * If we use ACPI to set PCI IRQs, then we should clear ELCR 609 * since we will set it correctly as we enable the PCI irq 610 * routing. 611 */ 612 new = acpi_noirq ? old : 0; 613 614 /* 615 * Update SCI information in the ELCR, it isn't in the PCI 616 * routing tables.. 617 */ 618 switch (trigger) { 619 case 1: /* Edge - clear */ 620 new &= ~mask; 621 break; 622 case 3: /* Level - set */ 623 new |= mask; 624 break; 625 } 626 627 if (old == new) 628 return; 629 630 pr_warn("setting ELCR to %04x (from %04x)\n", new, old); 631 outb(new, PIC_ELCR1); 632 outb(new >> 8, PIC_ELCR2); 633 } 634 635 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp) 636 { 637 int rc, irq, trigger, polarity; 638 639 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) { 640 *irqp = gsi; 641 return 0; 642 } 643 644 rc = acpi_get_override_irq(gsi, &trigger, &polarity); 645 if (rc) 646 return rc; 647 648 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE; 649 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH; 650 irq = acpi_register_gsi(NULL, gsi, trigger, polarity); 651 if (irq < 0) 652 return irq; 653 654 *irqp = irq; 655 return 0; 656 } 657 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq); 658 659 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) 660 { 661 if (isa_irq < nr_legacy_irqs() && 662 isa_irq_to_gsi[isa_irq] != INVALID_ACPI_IRQ) { 663 *gsi = isa_irq_to_gsi[isa_irq]; 664 return 0; 665 } 666 667 return -1; 668 } 669 670 static int acpi_register_gsi_pic(struct device *dev, u32 gsi, 671 int trigger, int polarity) 672 { 673 #ifdef CONFIG_PCI 674 /* 675 * Make sure all (legacy) PCI IRQs are set as level-triggered. 676 */ 677 if (trigger == ACPI_LEVEL_SENSITIVE) 678 elcr_set_level_irq(gsi); 679 #endif 680 681 return gsi; 682 } 683 684 #ifdef CONFIG_X86_LOCAL_APIC 685 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi, 686 int trigger, int polarity) 687 { 688 int irq = gsi; 689 #ifdef CONFIG_X86_IO_APIC 690 int node; 691 struct irq_alloc_info info; 692 693 node = dev ? dev_to_node(dev) : NUMA_NO_NODE; 694 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1; 695 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1; 696 ioapic_set_alloc_attr(&info, node, trigger, polarity); 697 698 mutex_lock(&acpi_ioapic_lock); 699 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info); 700 /* Don't set up the ACPI SCI because it's already set up */ 701 if (irq >= 0 && enable_update_mptable && gsi != acpi_gbl_FADT.sci_interrupt) 702 mp_config_acpi_gsi(dev, gsi, trigger, polarity); 703 mutex_unlock(&acpi_ioapic_lock); 704 #endif 705 706 return irq; 707 } 708 709 static void acpi_unregister_gsi_ioapic(u32 gsi) 710 { 711 #ifdef CONFIG_X86_IO_APIC 712 int irq; 713 714 mutex_lock(&acpi_ioapic_lock); 715 irq = mp_map_gsi_to_irq(gsi, 0, NULL); 716 if (irq > 0) 717 mp_unmap_irq(irq); 718 mutex_unlock(&acpi_ioapic_lock); 719 #endif 720 } 721 #endif 722 723 int (*__acpi_register_gsi)(struct device *dev, u32 gsi, 724 int trigger, int polarity) = acpi_register_gsi_pic; 725 void (*__acpi_unregister_gsi)(u32 gsi) = NULL; 726 727 #ifdef CONFIG_ACPI_SLEEP 728 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel; 729 #else 730 int (*acpi_suspend_lowlevel)(void); 731 #endif 732 733 /* 734 * success: return IRQ number (>=0) 735 * failure: return < 0 736 */ 737 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 738 { 739 return __acpi_register_gsi(dev, gsi, trigger, polarity); 740 } 741 EXPORT_SYMBOL_GPL(acpi_register_gsi); 742 743 void acpi_unregister_gsi(u32 gsi) 744 { 745 if (__acpi_unregister_gsi) 746 __acpi_unregister_gsi(gsi); 747 } 748 EXPORT_SYMBOL_GPL(acpi_unregister_gsi); 749 750 #ifdef CONFIG_X86_LOCAL_APIC 751 static void __init acpi_set_irq_model_ioapic(void) 752 { 753 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 754 __acpi_register_gsi = acpi_register_gsi_ioapic; 755 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic; 756 acpi_ioapic = 1; 757 } 758 #endif 759 760 /* 761 * ACPI based hotplug support for CPU 762 */ 763 #ifdef CONFIG_ACPI_HOTPLUG_CPU 764 #include <acpi/processor.h> 765 766 static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) 767 { 768 #ifdef CONFIG_ACPI_NUMA 769 int nid; 770 771 nid = acpi_get_node(handle); 772 if (nid != NUMA_NO_NODE) { 773 set_apicid_to_node(physid, nid); 774 numa_set_node(cpu, nid); 775 } 776 #endif 777 return 0; 778 } 779 780 int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id, int *pcpu) 781 { 782 int cpu = topology_hotplug_apic(physid, acpi_id); 783 784 if (cpu < 0) { 785 pr_info("Unable to map lapic to logical cpu number\n"); 786 return cpu; 787 } 788 789 acpi_processor_set_pdc(handle); 790 acpi_map_cpu2node(handle, cpu, physid); 791 792 *pcpu = cpu; 793 return 0; 794 } 795 EXPORT_SYMBOL(acpi_map_cpu); 796 797 int acpi_unmap_cpu(int cpu) 798 { 799 #ifdef CONFIG_ACPI_NUMA 800 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE); 801 #endif 802 topology_hotunplug_apic(cpu); 803 return 0; 804 } 805 EXPORT_SYMBOL(acpi_unmap_cpu); 806 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 807 808 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 809 { 810 int ret = -ENOSYS; 811 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 812 int ioapic_id; 813 u64 addr; 814 struct ioapic_domain_cfg cfg = { 815 .type = IOAPIC_DOMAIN_DYNAMIC, 816 .ops = &mp_ioapic_irqdomain_ops, 817 }; 818 819 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr); 820 if (ioapic_id < 0) { 821 unsigned long long uid; 822 acpi_status status; 823 824 status = acpi_evaluate_integer(handle, METHOD_NAME__UID, 825 NULL, &uid); 826 if (ACPI_FAILURE(status)) { 827 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n"); 828 return -EINVAL; 829 } 830 ioapic_id = (int)uid; 831 } 832 833 mutex_lock(&acpi_ioapic_lock); 834 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg); 835 mutex_unlock(&acpi_ioapic_lock); 836 #endif 837 838 return ret; 839 } 840 EXPORT_SYMBOL(acpi_register_ioapic); 841 842 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 843 { 844 int ret = -ENOSYS; 845 846 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 847 mutex_lock(&acpi_ioapic_lock); 848 ret = mp_unregister_ioapic(gsi_base); 849 mutex_unlock(&acpi_ioapic_lock); 850 #endif 851 852 return ret; 853 } 854 EXPORT_SYMBOL(acpi_unregister_ioapic); 855 856 /** 857 * acpi_ioapic_registered - Check whether IOAPIC associated with @gsi_base 858 * has been registered 859 * @handle: ACPI handle of the IOAPIC device 860 * @gsi_base: GSI base associated with the IOAPIC 861 * 862 * Assume caller holds some type of lock to serialize acpi_ioapic_registered() 863 * with acpi_register_ioapic()/acpi_unregister_ioapic(). 864 */ 865 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base) 866 { 867 int ret = 0; 868 869 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 870 mutex_lock(&acpi_ioapic_lock); 871 ret = mp_ioapic_registered(gsi_base); 872 mutex_unlock(&acpi_ioapic_lock); 873 #endif 874 875 return ret; 876 } 877 878 static int __init acpi_parse_sbf(struct acpi_table_header *table) 879 { 880 struct acpi_table_boot *sb = (struct acpi_table_boot *)table; 881 882 sbf_port = sb->cmos_index; /* Save CMOS port */ 883 884 return 0; 885 } 886 887 #ifdef CONFIG_HPET_TIMER 888 #include <asm/hpet.h> 889 890 static struct resource *hpet_res __initdata; 891 892 static int __init acpi_parse_hpet(struct acpi_table_header *table) 893 { 894 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table; 895 896 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { 897 pr_warn("HPET timers must be located in memory.\n"); 898 return -1; 899 } 900 901 hpet_address = hpet_tbl->address.address; 902 hpet_blockid = hpet_tbl->sequence; 903 904 /* 905 * Some broken BIOSes advertise HPET at 0x0. We really do not 906 * want to allocate a resource there. 907 */ 908 if (!hpet_address) { 909 pr_warn("HPET id: %#x base: %#lx is invalid\n", hpet_tbl->id, hpet_address); 910 return 0; 911 } 912 #ifdef CONFIG_X86_64 913 /* 914 * Some even more broken BIOSes advertise HPET at 915 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add 916 * some noise: 917 */ 918 if (hpet_address == 0xfed0000000000000UL) { 919 if (!hpet_force_user) { 920 pr_warn("HPET id: %#x base: 0xfed0000000000000 is bogus, try hpet=force on the kernel command line to fix it up to 0xfed00000.\n", 921 hpet_tbl->id); 922 hpet_address = 0; 923 return 0; 924 } 925 pr_warn("HPET id: %#x base: 0xfed0000000000000 fixed up to 0xfed00000.\n", 926 hpet_tbl->id); 927 hpet_address >>= 32; 928 } 929 #endif 930 pr_info("HPET id: %#x base: %#lx\n", hpet_tbl->id, hpet_address); 931 932 /* 933 * Allocate and initialize the HPET firmware resource for adding into 934 * the resource tree during the lateinit timeframe. 935 */ 936 #define HPET_RESOURCE_NAME_SIZE 9 937 hpet_res = memblock_alloc_or_panic(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE, 938 SMP_CACHE_BYTES); 939 940 hpet_res->name = (void *)&hpet_res[1]; 941 hpet_res->flags = IORESOURCE_MEM; 942 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 943 hpet_tbl->sequence); 944 945 hpet_res->start = hpet_address; 946 hpet_res->end = hpet_address + (1 * 1024) - 1; 947 948 return 0; 949 } 950 951 /* 952 * hpet_insert_resource inserts the HPET resources used into the resource 953 * tree. 954 */ 955 static __init int hpet_insert_resource(void) 956 { 957 if (!hpet_res) 958 return 1; 959 960 return insert_resource(&iomem_resource, hpet_res); 961 } 962 963 late_initcall(hpet_insert_resource); 964 965 #else 966 #define acpi_parse_hpet NULL 967 #endif 968 969 static int __init acpi_parse_fadt(struct acpi_table_header *table) 970 { 971 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) { 972 pr_debug("no legacy devices present\n"); 973 x86_platform.legacy.devices.pnpbios = 0; 974 } 975 976 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID && 977 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) && 978 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) { 979 pr_debug("i8042 controller is absent\n"); 980 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT; 981 } 982 983 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) { 984 pr_debug("not registering RTC platform device\n"); 985 x86_platform.legacy.rtc = 0; 986 } 987 988 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_VGA) { 989 pr_debug("probing for VGA not safe\n"); 990 x86_platform.legacy.no_vga = 1; 991 } 992 993 #ifdef CONFIG_X86_PM_TIMER 994 /* detect the location of the ACPI PM Timer */ 995 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 996 /* FADT rev. 2 */ 997 if (acpi_gbl_FADT.xpm_timer_block.space_id != 998 ACPI_ADR_SPACE_SYSTEM_IO) 999 return 0; 1000 1001 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 1002 /* 1003 * "X" fields are optional extensions to the original V1.0 1004 * fields, so we must selectively expand V1.0 fields if the 1005 * corresponding X field is zero. 1006 */ 1007 if (!pmtmr_ioport) 1008 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 1009 } else { 1010 /* FADT rev. 1 */ 1011 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 1012 } 1013 if (pmtmr_ioport) 1014 pr_info("PM-Timer IO Port: %#x\n", pmtmr_ioport); 1015 #endif 1016 return 0; 1017 } 1018 1019 #ifdef CONFIG_X86_LOCAL_APIC 1020 /* 1021 * Parse LAPIC entries in MADT 1022 * returns 0 on success, < 0 on error 1023 */ 1024 1025 static int __init early_acpi_parse_madt_lapic_addr_ovr(void) 1026 { 1027 int count; 1028 1029 if (!boot_cpu_has(X86_FEATURE_APIC)) 1030 return -ENODEV; 1031 1032 /* 1033 * Note that the LAPIC address is obtained from the MADT (32-bit value) 1034 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value). 1035 */ 1036 1037 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 1038 acpi_parse_lapic_addr_ovr, 0); 1039 if (count < 0) { 1040 pr_err("Error parsing LAPIC address override entry\n"); 1041 return count; 1042 } 1043 1044 register_lapic_address(acpi_lapic_addr); 1045 1046 return count; 1047 } 1048 1049 static int __init acpi_parse_madt_lapic_entries(void) 1050 { 1051 int count, x2count = 0; 1052 struct acpi_subtable_proc madt_proc[2]; 1053 int ret; 1054 1055 if (!boot_cpu_has(X86_FEATURE_APIC)) 1056 return -ENODEV; 1057 1058 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 1059 acpi_parse_sapic, MAX_LOCAL_APIC); 1060 1061 if (!count) { 1062 /* Check if there are valid LAPIC entries */ 1063 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC, acpi_check_lapic, MAX_LOCAL_APIC); 1064 1065 /* 1066 * Enumerate the APIC IDs in the order that they appear in the 1067 * MADT, no matter LAPIC entry or x2APIC entry is used. 1068 */ 1069 memset(madt_proc, 0, sizeof(madt_proc)); 1070 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC; 1071 madt_proc[0].handler = acpi_parse_lapic; 1072 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC; 1073 madt_proc[1].handler = acpi_parse_x2apic; 1074 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT, 1075 sizeof(struct acpi_table_madt), 1076 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC); 1077 if (ret < 0) { 1078 pr_err("Error parsing LAPIC/X2APIC entries\n"); 1079 return ret; 1080 } 1081 count = madt_proc[0].count; 1082 x2count = madt_proc[1].count; 1083 } 1084 if (!count && !x2count) { 1085 pr_err("No LAPIC entries present\n"); 1086 /* TBD: Cleanup to allow fallback to MPS */ 1087 return -ENODEV; 1088 } else if (count < 0 || x2count < 0) { 1089 pr_err("Error parsing LAPIC entry\n"); 1090 /* TBD: Cleanup to allow fallback to MPS */ 1091 return count; 1092 } 1093 1094 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI, 1095 acpi_parse_x2apic_nmi, 0); 1096 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, 1097 acpi_parse_lapic_nmi, 0); 1098 if (count < 0 || x2count < 0) { 1099 pr_err("Error parsing LAPIC NMI entry\n"); 1100 /* TBD: Cleanup to allow fallback to MPS */ 1101 return count; 1102 } 1103 return 0; 1104 } 1105 #endif /* CONFIG_X86_LOCAL_APIC */ 1106 1107 #ifdef CONFIG_X86_IO_APIC 1108 static void __init mp_config_acpi_legacy_irqs(void) 1109 { 1110 int i; 1111 struct mpc_intsrc mp_irq; 1112 1113 #ifdef CONFIG_EISA 1114 /* 1115 * Fabricate the legacy ISA bus (bus #31). 1116 */ 1117 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; 1118 #endif 1119 set_bit(MP_ISA_BUS, mp_bus_not_pci); 1120 pr_debug("Bus #%d is ISA (nIRQs: %d)\n", MP_ISA_BUS, nr_legacy_irqs()); 1121 1122 /* 1123 * Use the default configuration for the IRQs 0-15. Unless 1124 * overridden by (MADT) interrupt source override entries. 1125 */ 1126 for (i = 0; i < nr_legacy_irqs(); i++) { 1127 int ioapic, pin; 1128 unsigned int dstapic; 1129 int idx; 1130 u32 gsi; 1131 1132 /* Locate the gsi that irq i maps to. */ 1133 if (acpi_isa_irq_to_gsi(i, &gsi)) 1134 continue; 1135 1136 /* 1137 * Locate the IOAPIC that manages the ISA IRQ. 1138 */ 1139 ioapic = mp_find_ioapic(gsi); 1140 if (ioapic < 0) 1141 continue; 1142 pin = mp_find_ioapic_pin(ioapic, gsi); 1143 dstapic = mpc_ioapic_id(ioapic); 1144 1145 for (idx = 0; idx < mp_irq_entries; idx++) { 1146 struct mpc_intsrc *irq = mp_irqs + idx; 1147 1148 /* Do we already have a mapping for this ISA IRQ? */ 1149 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) 1150 break; 1151 1152 /* Do we already have a mapping for this IOAPIC pin */ 1153 if (irq->dstapic == dstapic && irq->dstirq == pin) 1154 break; 1155 } 1156 1157 if (idx != mp_irq_entries) { 1158 pr_debug("ACPI: IRQ%d used by override.\n", i); 1159 continue; /* IRQ already used */ 1160 } 1161 1162 mp_irq.type = MP_INTSRC; 1163 mp_irq.irqflag = 0; /* Conforming */ 1164 mp_irq.srcbus = MP_ISA_BUS; 1165 mp_irq.dstapic = dstapic; 1166 mp_irq.irqtype = mp_INT; 1167 mp_irq.srcbusirq = i; /* Identity mapped */ 1168 mp_irq.dstirq = pin; 1169 1170 mp_save_irq(&mp_irq); 1171 } 1172 } 1173 1174 /* 1175 * Parse IOAPIC related entries in MADT 1176 * returns 0 on success, < 0 on error 1177 */ 1178 static int __init acpi_parse_madt_ioapic_entries(void) 1179 { 1180 int count; 1181 1182 /* 1183 * ACPI interpreter is required to complete interrupt setup, 1184 * so if it is off, don't enumerate the io-apics with ACPI. 1185 * If MPS is present, it will handle them, 1186 * otherwise the system will stay in PIC mode 1187 */ 1188 if (acpi_disabled || acpi_noirq) 1189 return -ENODEV; 1190 1191 if (!boot_cpu_has(X86_FEATURE_APIC)) 1192 return -ENODEV; 1193 1194 /* 1195 * if "noapic" boot option, don't look for IO-APICs 1196 */ 1197 if (ioapic_is_disabled) { 1198 pr_info("Skipping IOAPIC probe due to 'noapic' option.\n"); 1199 return -ENODEV; 1200 } 1201 1202 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 1203 MAX_IO_APICS); 1204 if (!count) { 1205 pr_err("No IOAPIC entries present\n"); 1206 return -ENODEV; 1207 } else if (count < 0) { 1208 pr_err("Error parsing IOAPIC entry\n"); 1209 return count; 1210 } 1211 1212 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, 1213 acpi_parse_int_src_ovr, 1214 irq_get_nr_irqs()); 1215 if (count < 0) { 1216 pr_err("Error parsing interrupt source overrides entry\n"); 1217 /* TBD: Cleanup to allow fallback to MPS */ 1218 return count; 1219 } 1220 1221 /* 1222 * If BIOS did not supply an INT_SRC_OVR for the SCI 1223 * pretend we got one so we can set the SCI flags. 1224 * But ignore setting up SCI on hardware reduced platforms. 1225 */ 1226 if (acpi_sci_override_gsi == INVALID_ACPI_IRQ && !acpi_gbl_reduced_hardware) 1227 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0, 1228 acpi_gbl_FADT.sci_interrupt); 1229 1230 /* Fill in identity legacy mappings where no override */ 1231 mp_config_acpi_legacy_irqs(); 1232 1233 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, 1234 acpi_parse_nmi_src, 1235 irq_get_nr_irqs()); 1236 if (count < 0) { 1237 pr_err("Error parsing NMI SRC entry\n"); 1238 /* TBD: Cleanup to allow fallback to MPS */ 1239 return count; 1240 } 1241 1242 return 0; 1243 } 1244 #else 1245 static inline int acpi_parse_madt_ioapic_entries(void) 1246 { 1247 return -1; 1248 } 1249 #endif /* !CONFIG_X86_IO_APIC */ 1250 1251 static void __init early_acpi_process_madt(void) 1252 { 1253 #ifdef CONFIG_X86_LOCAL_APIC 1254 int error; 1255 1256 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1257 1258 /* 1259 * Parse MADT LAPIC entries 1260 */ 1261 error = early_acpi_parse_madt_lapic_addr_ovr(); 1262 if (!error) { 1263 acpi_lapic = 1; 1264 smp_found_config = 1; 1265 } 1266 if (error == -EINVAL) { 1267 /* 1268 * Dell Precision Workstation 410, 610 come here. 1269 */ 1270 pr_err("Invalid BIOS MADT, disabling ACPI\n"); 1271 disable_acpi(); 1272 } 1273 } 1274 #endif 1275 } 1276 1277 static void __init acpi_process_madt(void) 1278 { 1279 #ifdef CONFIG_X86_LOCAL_APIC 1280 int error; 1281 1282 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1283 1284 /* 1285 * Parse MADT LAPIC entries 1286 */ 1287 error = acpi_parse_madt_lapic_entries(); 1288 if (!error) { 1289 acpi_lapic = 1; 1290 1291 /* 1292 * Parse MADT IO-APIC entries 1293 */ 1294 mutex_lock(&acpi_ioapic_lock); 1295 error = acpi_parse_madt_ioapic_entries(); 1296 mutex_unlock(&acpi_ioapic_lock); 1297 if (!error) { 1298 acpi_set_irq_model_ioapic(); 1299 1300 smp_found_config = 1; 1301 } 1302 1303 #ifdef CONFIG_ACPI_MADT_WAKEUP 1304 /* 1305 * Parse MADT MP Wake entry. 1306 */ 1307 acpi_table_parse_madt(ACPI_MADT_TYPE_MULTIPROC_WAKEUP, 1308 acpi_parse_mp_wake, 1); 1309 #endif 1310 } 1311 if (error == -EINVAL) { 1312 /* 1313 * Dell Precision Workstation 410, 610 come here. 1314 */ 1315 pr_err("Invalid BIOS MADT, disabling ACPI\n"); 1316 disable_acpi(); 1317 } 1318 } else { 1319 /* 1320 * ACPI found no MADT, and so ACPI wants UP PIC mode. 1321 * In the event an MPS table was found, forget it. 1322 * Boot with "acpi=off" to use MPS on such a system. 1323 */ 1324 if (smp_found_config) { 1325 pr_warn("No APIC-table, disabling MPS\n"); 1326 smp_found_config = 0; 1327 } 1328 } 1329 1330 /* 1331 * ACPI supports both logical (e.g. Hyper-Threading) and physical 1332 * processors, where MPS only supports physical. 1333 */ 1334 if (acpi_lapic && acpi_ioapic) 1335 pr_info("Using ACPI (MADT) for SMP configuration information\n"); 1336 else if (acpi_lapic) 1337 pr_info("Using ACPI for processor (LAPIC) configuration information\n"); 1338 #endif 1339 return; 1340 } 1341 1342 static int __init disable_acpi_irq(const struct dmi_system_id *d) 1343 { 1344 if (!acpi_force) { 1345 pr_notice("%s detected: force use of acpi=noirq\n", d->ident); 1346 acpi_noirq_set(); 1347 } 1348 return 0; 1349 } 1350 1351 static int __init disable_acpi_pci(const struct dmi_system_id *d) 1352 { 1353 if (!acpi_force) { 1354 pr_notice("%s detected: force use of pci=noacpi\n", d->ident); 1355 acpi_disable_pci(); 1356 } 1357 return 0; 1358 } 1359 1360 static int __init disable_acpi_xsdt(const struct dmi_system_id *d) 1361 { 1362 if (!acpi_force) { 1363 pr_notice("%s detected: force use of acpi=rsdt\n", d->ident); 1364 acpi_gbl_do_not_use_xsdt = TRUE; 1365 } else { 1366 pr_notice("Warning: DMI blacklist says broken, but acpi XSDT forced\n"); 1367 } 1368 return 0; 1369 } 1370 1371 static int __init dmi_disable_acpi(const struct dmi_system_id *d) 1372 { 1373 if (!acpi_force) { 1374 pr_notice("%s detected: acpi off\n", d->ident); 1375 disable_acpi(); 1376 } else { 1377 pr_notice("Warning: DMI blacklist says broken, but acpi forced\n"); 1378 } 1379 return 0; 1380 } 1381 1382 /* 1383 * Force ignoring BIOS IRQ0 override 1384 */ 1385 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) 1386 { 1387 if (!acpi_skip_timer_override) { 1388 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n", 1389 d->ident); 1390 acpi_skip_timer_override = 1; 1391 } 1392 return 0; 1393 } 1394 1395 /* 1396 * ACPI offers an alternative platform interface model that removes 1397 * ACPI hardware requirements for platforms that do not implement 1398 * the PC Architecture. 1399 * 1400 * We initialize the Hardware-reduced ACPI model here: 1401 */ 1402 void __init acpi_generic_reduced_hw_init(void) 1403 { 1404 /* 1405 * Override x86_init functions and bypass legacy PIC in 1406 * hardware reduced ACPI mode. 1407 */ 1408 x86_init.timers.timer_init = x86_init_noop; 1409 x86_init.irqs.pre_vector_init = x86_init_noop; 1410 legacy_pic = &null_legacy_pic; 1411 } 1412 1413 static void __init acpi_reduced_hw_init(void) 1414 { 1415 if (acpi_gbl_reduced_hardware) 1416 x86_init.acpi.reduced_hw_early_init(); 1417 } 1418 1419 /* 1420 * If your system is blacklisted here, but you find that acpi=force 1421 * works for you, please contact linux-acpi@vger.kernel.org 1422 */ 1423 static const struct dmi_system_id acpi_dmi_table[] __initconst = { 1424 /* 1425 * Boxes that need ACPI disabled 1426 */ 1427 { 1428 .callback = dmi_disable_acpi, 1429 .ident = "IBM Thinkpad", 1430 .matches = { 1431 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1432 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1433 }, 1434 }, 1435 1436 /* 1437 * Boxes that need ACPI PCI IRQ routing disabled 1438 */ 1439 { 1440 .callback = disable_acpi_irq, 1441 .ident = "ASUS A7V", 1442 .matches = { 1443 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1444 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1445 /* newer BIOS, Revision 1011, does work */ 1446 DMI_MATCH(DMI_BIOS_VERSION, 1447 "ASUS A7V ACPI BIOS Revision 1007"), 1448 }, 1449 }, 1450 { 1451 /* 1452 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1453 * for LPC bridge, which is needed for the PCI 1454 * interrupt links to work. DSDT fix is in bug 5966. 1455 * 2645, 2646 model numbers are shared with 600/600E/600X 1456 */ 1457 .callback = disable_acpi_irq, 1458 .ident = "IBM Thinkpad 600 Series 2645", 1459 .matches = { 1460 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1461 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1462 }, 1463 }, 1464 { 1465 .callback = disable_acpi_irq, 1466 .ident = "IBM Thinkpad 600 Series 2646", 1467 .matches = { 1468 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1469 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1470 }, 1471 }, 1472 /* 1473 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1474 */ 1475 { /* _BBN 0 bug */ 1476 .callback = disable_acpi_pci, 1477 .ident = "ASUS PR-DLS", 1478 .matches = { 1479 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1480 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1481 DMI_MATCH(DMI_BIOS_VERSION, 1482 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1483 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1484 }, 1485 }, 1486 { 1487 .callback = disable_acpi_pci, 1488 .ident = "Acer TravelMate 36x Laptop", 1489 .matches = { 1490 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1491 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1492 }, 1493 }, 1494 /* 1495 * Boxes that need ACPI XSDT use disabled due to corrupted tables 1496 */ 1497 { 1498 .callback = disable_acpi_xsdt, 1499 .ident = "Advantech DAC-BJ01", 1500 .matches = { 1501 DMI_MATCH(DMI_SYS_VENDOR, "NEC"), 1502 DMI_MATCH(DMI_PRODUCT_NAME, "Bearlake CRB Board"), 1503 DMI_MATCH(DMI_BIOS_VERSION, "V1.12"), 1504 DMI_MATCH(DMI_BIOS_DATE, "02/01/2011"), 1505 }, 1506 }, 1507 {} 1508 }; 1509 1510 /* second table for DMI checks that should run after early-quirks */ 1511 static const struct dmi_system_id acpi_dmi_table_late[] __initconst = { 1512 /* 1513 * HP laptops which use a DSDT reporting as HP/SB400/10000, 1514 * which includes some code which overrides all temperature 1515 * trip points to 16C if the INTIN2 input of the I/O APIC 1516 * is enabled. This input is incorrectly designated the 1517 * ISA IRQ 0 via an interrupt source override even though 1518 * it is wired to the output of the master 8259A and INTIN0 1519 * is not connected at all. Force ignoring BIOS IRQ0 1520 * override in that cases. 1521 */ 1522 { 1523 .callback = dmi_ignore_irq0_timer_override, 1524 .ident = "HP nx6115 laptop", 1525 .matches = { 1526 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1527 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), 1528 }, 1529 }, 1530 { 1531 .callback = dmi_ignore_irq0_timer_override, 1532 .ident = "HP NX6125 laptop", 1533 .matches = { 1534 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1535 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), 1536 }, 1537 }, 1538 { 1539 .callback = dmi_ignore_irq0_timer_override, 1540 .ident = "HP NX6325 laptop", 1541 .matches = { 1542 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1543 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), 1544 }, 1545 }, 1546 { 1547 .callback = dmi_ignore_irq0_timer_override, 1548 .ident = "HP 6715b laptop", 1549 .matches = { 1550 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1551 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), 1552 }, 1553 }, 1554 { 1555 .callback = dmi_ignore_irq0_timer_override, 1556 .ident = "FUJITSU SIEMENS", 1557 .matches = { 1558 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), 1559 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"), 1560 }, 1561 }, 1562 {} 1563 }; 1564 1565 /* 1566 * acpi_boot_table_init() and acpi_boot_init() 1567 * called from setup_arch(), always. 1568 * 1. checksums all tables 1569 * 2. enumerates lapics 1570 * 3. enumerates io-apics 1571 * 1572 * acpi_table_init() is separate to allow reading SRAT without 1573 * other side effects. 1574 * 1575 * side effects of acpi_boot_init: 1576 * acpi_lapic = 1 if LAPIC found 1577 * acpi_ioapic = 1 if IOAPIC found 1578 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1579 * if acpi_blacklisted() acpi_disabled = 1; 1580 * acpi_irq_model=... 1581 * ... 1582 */ 1583 1584 void __init acpi_boot_table_init(void) 1585 { 1586 dmi_check_system(acpi_dmi_table); 1587 1588 /* 1589 * If acpi_disabled, bail out 1590 */ 1591 if (acpi_disabled) 1592 return; 1593 1594 /* 1595 * Initialize the ACPI boot-time table parser. 1596 */ 1597 if (acpi_locate_initial_tables()) 1598 disable_acpi(); 1599 else 1600 acpi_reserve_initial_tables(); 1601 } 1602 1603 int __init early_acpi_boot_init(void) 1604 { 1605 if (acpi_disabled) 1606 return 1; 1607 1608 acpi_table_init_complete(); 1609 1610 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1611 1612 /* 1613 * blacklist may disable ACPI entirely 1614 */ 1615 if (acpi_blacklisted()) { 1616 if (acpi_force) { 1617 pr_warn("acpi=force override\n"); 1618 } else { 1619 pr_warn("Disabling ACPI support\n"); 1620 disable_acpi(); 1621 return 1; 1622 } 1623 } 1624 1625 /* 1626 * Process the Multiple APIC Description Table (MADT), if present 1627 */ 1628 early_acpi_process_madt(); 1629 1630 /* 1631 * Hardware-reduced ACPI mode initialization: 1632 */ 1633 acpi_reduced_hw_init(); 1634 1635 return 0; 1636 } 1637 1638 int __init acpi_boot_init(void) 1639 { 1640 /* those are executed after early-quirks are executed */ 1641 dmi_check_system(acpi_dmi_table_late); 1642 1643 /* 1644 * If acpi_disabled, bail out 1645 */ 1646 if (acpi_disabled) 1647 return 1; 1648 1649 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1650 1651 /* 1652 * set sci_int and PM timer address 1653 */ 1654 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1655 1656 /* 1657 * Process the Multiple APIC Description Table (MADT), if present 1658 */ 1659 acpi_process_madt(); 1660 1661 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1662 if (IS_ENABLED(CONFIG_ACPI_BGRT) && !acpi_nobgrt) 1663 acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt); 1664 1665 if (!acpi_noirq) 1666 x86_init.pci.init = pci_acpi_init; 1667 1668 /* Do not enable ACPI SPCR console by default */ 1669 acpi_parse_spcr(earlycon_acpi_spcr_enable, false); 1670 return 0; 1671 } 1672 1673 static int __init parse_acpi(char *arg) 1674 { 1675 if (!arg) 1676 return -EINVAL; 1677 1678 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1679 if (strcmp(arg, "off") == 0) { 1680 disable_acpi(); 1681 } 1682 /* acpi=force to over-ride black-list */ 1683 else if (strcmp(arg, "force") == 0) { 1684 acpi_force = 1; 1685 acpi_disabled = 0; 1686 } 1687 /* acpi=strict disables out-of-spec workarounds */ 1688 else if (strcmp(arg, "strict") == 0) { 1689 acpi_strict = 1; 1690 } 1691 /* acpi=rsdt use RSDT instead of XSDT */ 1692 else if (strcmp(arg, "rsdt") == 0) { 1693 acpi_gbl_do_not_use_xsdt = TRUE; 1694 } 1695 /* "acpi=noirq" disables ACPI interrupt routing */ 1696 else if (strcmp(arg, "noirq") == 0) { 1697 acpi_noirq_set(); 1698 } 1699 /* "acpi=copy_dsdt" copies DSDT */ 1700 else if (strcmp(arg, "copy_dsdt") == 0) { 1701 acpi_gbl_copy_dsdt_locally = 1; 1702 } 1703 /* "acpi=nocmcff" disables FF mode for corrected errors */ 1704 else if (strcmp(arg, "nocmcff") == 0) { 1705 acpi_disable_cmcff = 1; 1706 } else { 1707 /* Core will printk when we return error. */ 1708 return -EINVAL; 1709 } 1710 return 0; 1711 } 1712 early_param("acpi", parse_acpi); 1713 1714 static int __init parse_acpi_bgrt(char *arg) 1715 { 1716 acpi_nobgrt = true; 1717 return 0; 1718 } 1719 early_param("bgrt_disable", parse_acpi_bgrt); 1720 1721 /* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1722 static int __init parse_pci(char *arg) 1723 { 1724 if (arg && strcmp(arg, "noacpi") == 0) 1725 acpi_disable_pci(); 1726 return 0; 1727 } 1728 early_param("pci", parse_pci); 1729 1730 int __init acpi_mps_check(void) 1731 { 1732 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) 1733 /* mptable code is not built-in*/ 1734 1735 /* 1736 * Xen disables ACPI in PV DomU guests but it still emulates APIC and 1737 * supports SMP. Returning early here ensures that APIC is not disabled 1738 * unnecessarily and the guest is not limited to a single vCPU. 1739 */ 1740 if (xen_pv_domain() && !xen_initial_domain()) 1741 return 0; 1742 1743 if (acpi_disabled || acpi_noirq) { 1744 pr_warn("MPS support code is not built-in, using acpi=off or acpi=noirq or pci=noacpi may have problem\n"); 1745 return 1; 1746 } 1747 #endif 1748 return 0; 1749 } 1750 1751 #ifdef CONFIG_X86_IO_APIC 1752 static int __init parse_acpi_skip_timer_override(char *arg) 1753 { 1754 acpi_skip_timer_override = 1; 1755 return 0; 1756 } 1757 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1758 1759 static int __init parse_acpi_use_timer_override(char *arg) 1760 { 1761 acpi_use_timer_override = 1; 1762 return 0; 1763 } 1764 early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1765 #endif /* CONFIG_X86_IO_APIC */ 1766 1767 static int __init setup_acpi_sci(char *s) 1768 { 1769 if (!s) 1770 return -EINVAL; 1771 if (!strcmp(s, "edge")) 1772 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1773 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1774 else if (!strcmp(s, "level")) 1775 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1776 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1777 else if (!strcmp(s, "high")) 1778 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1779 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1780 else if (!strcmp(s, "low")) 1781 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1782 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1783 else 1784 return -EINVAL; 1785 return 0; 1786 } 1787 early_param("acpi_sci", setup_acpi_sci); 1788 1789 int __acpi_acquire_global_lock(unsigned int *lock) 1790 { 1791 unsigned int old, new, val; 1792 1793 old = READ_ONCE(*lock); 1794 do { 1795 val = (old >> 1) & 0x1; 1796 new = (old & ~0x3) + 2 + val; 1797 } while (!try_cmpxchg(lock, &old, new)); 1798 1799 if (val) 1800 return 0; 1801 1802 return -1; 1803 } 1804 1805 int __acpi_release_global_lock(unsigned int *lock) 1806 { 1807 unsigned int old, new; 1808 1809 old = READ_ONCE(*lock); 1810 do { 1811 new = old & ~0x3; 1812 } while (!try_cmpxchg(lock, &old, new)); 1813 return old & 0x1; 1814 } 1815 1816 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size) 1817 { 1818 e820__range_add(addr, size, E820_TYPE_NVS); 1819 e820__update_table_print(); 1820 } 1821 1822 void x86_default_set_root_pointer(u64 addr) 1823 { 1824 boot_params.acpi_rsdp_addr = addr; 1825 } 1826 1827 u64 x86_default_get_root_pointer(void) 1828 { 1829 return boot_params.acpi_rsdp_addr; 1830 } 1831 1832 #ifdef CONFIG_XEN_PV 1833 void __iomem *x86_acpi_os_ioremap(acpi_physical_address phys, acpi_size size) 1834 { 1835 return ioremap_cache(phys, size); 1836 } 1837 1838 void __iomem * (*acpi_os_ioremap)(acpi_physical_address phys, acpi_size size) = 1839 x86_acpi_os_ioremap; 1840 EXPORT_SYMBOL_GPL(acpi_os_ioremap); 1841 #endif 1842